Returns the total number of documents.
When an instance of Quick PDF Library is first created a blank one page document is automatically created so the document count will be 1. Each time a new document is created or loaded the document count will be increased. The RemoveDocument function will only succeed if there are at least two documents loaded, so the document count will always be at least 1.
function TDebenuPDFLibrary1511.DocumentCount: Integer;
Function DebenuPDFLibrary1511.PDFLibrary::DocumentCount As Long
int DPLDocumentCount(int InstanceID)